Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
thu sach » thuat sach, thuoc sach, thu hoach
cham duc » pham duc, cham soc, pham duy
hanh tai » thanh tai, hang tai, han tai
duc manh » suc manh, duc anh, duc minh
va triet » va thiet, va trien, ve triet
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
nang ma » tang ma, sang ma, nang cao
tu sach » su sach, te sach, tu cach
tai va » thai va, mai va, tri va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) nha ((nang ma) or (nang x)) hoi. hieu vu cham duc manh hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) nha ((nang ma) OR (nang x)) hoi. hieu vu cham duc manh hanh tai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) nha ((nang ma) or (nang x)) hoi. hieu vu cham duc manh hanh tai va triet*".